Navigation device



FIG. 1 is a front isometric view of a navigation device according to the present invention;

FIG. 2 is a rear isometric view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear plan view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

Portions of FIGS. 1 through 8 are shown in dashed lines for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a navigation device, as shown and described. 